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Q:

Which one of the followingis notan allotrope of carbon?

A) Coal B) Diamond
C) Graphite D) Graphene
 
Answer & Explanation Answer: A) Coal

Explanation:

Allotropy is the property of some chemical elements to exist in two or more different forms, or allotropes, when found in nature. There are several allotropes of carbon like diamond, graphite, graphene, fullerene, etc.Coal is not an allotrope of carbon because it is not 100% carbon. It contains lot of silica, sulphur and other compounds of carbon apart from carbon.

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Q:

__________ is the interaction in which one species benefits and the other is neither harmed nor benefited.

A) Predation B) Commensalism
C) Competition D) Parasitism
 
Answer & Explanation Answer: B) Commensalism

Explanation:
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Q:

Which one of the following statements is correct?

A) The oxidation number for hydrogen is always zero. B) The oxidation number for hydrogen is always + 1.
C) The oxidation number for hydrogen is always -1. D) Hydrogen can have more than one oxidation number.
 
Answer & Explanation Answer: D) Hydrogen can have more than one oxidation number.

Explanation:

Hydrogen has two possible oxidation numbers: +1 and -1.

-1 in case of hydrides.

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Q:

Which of the following is a greenhouse gas or a gas which can deplete the ozone layer?

A) B2H6 B) NF3
C) CCl3F D) C6H6
 
Answer & Explanation Answer: C) CCl3F

Explanation:
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Q:

Number of Sigma and Pi bonds in benzene, respectively is

A) 12 and 3 B) 3 and 3
C) 6 and 3 D) 9 and 3
 
Answer & Explanation Answer: A) 12 and 3

Explanation:
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Q:

Who is the new Director of Film and Television Institute of India (FTII)

A) Prashant Pathrabe B) Amol Palekar
C) Shabana Azmi D) Bhupendra Kainthola
 
Answer & Explanation Answer: D) Bhupendra Kainthola

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Q:

UNESCO Headquarters is in

A) Moscow B) New York
C) London D) Paris
 
Answer & Explanation Answer: D) Paris

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Q:

Which among the following is the major cause of acid rain?

A) Carbon dioxide B) Carbon monoxide
C) Nitrogen dioxide D) Oxygen
 
Answer & Explanation Answer: C) Nitrogen dioxide

Explanation:
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